Hi,
the current C-117 and C-47 mdls under development have dedicated carb heat levers in the expected position, marked "C".
We are also trying to include a hydraulic pressure indicator.
Default cowl-flap op should also work via the default Shift-Ctrl-C (close) and Shift-Ctrl-V (open) keypresses, unless otherwise assigned.
The Basler doesn't have cowl flaps. (Should it?)
The lesser known Braddick Turbo DC-3 has an (oil-cooler?) flap on the underside of the engines, and it does visually act on Shift-Ctrl-C/V, IIRC.